EP 2785678 A1 20141008 - METHOD FOR RECOVERING AND PURIFYING PROPIONIC ACID
Title (en)
METHOD FOR RECOVERING AND PURIFYING PROPIONIC ACID
Title (de)
VERFAHREN ZUR GEWINNUNG UND REINIGUNG VON PROPIONSÄURE
Title (fr)
PROCÉDÉ POUR LA RÉCUPÉRATION ET LA PURIFICATION D'ACIDE PROPIONIQUE
Publication
Application
Priority
- FI 20116209 A 20111201
- FI 2012051166 W 20121126
Abstract (en)
[origin: WO2013079785A1] The present invention provides a method for purifying and recovering propionic acid from an aqueous mixture containing a fermentation product obtained from a fermentation process using glycerol as substrate, the method comprising optionally acidifying the aqueous mixture to a pH below 4.5, subjecting the aqueous mixture to an extraction with extracting agent containing a heavy extractant and optionally a light extractant as a diluent to obtain an extract comprising the extracting agent and organic acids, and a raffinate comprising water and any unreacted glycerol, and subjecting the extract to vacuum evaporation to separate propionic acid-containing organic acids from the extractant.
IPC 8 full level
C07C 51/48 (2006.01); C07C 51/44 (2006.01); C07C 53/122 (2006.01); C12P 7/52 (2006.01)
CPC (source: CN EP FI US)
C07C 51/42 (2013.01 - US); C07C 51/44 (2013.01 - CN EP US); C07C 51/48 (2013.01 - CN EP FI US); C07C 53/122 (2013.01 - FI); C12P 7/52 (2013.01 - CN EP FI US)
Citation (search report)
See references of WO 2013079785A1
Citation (examination)
GB 689411 A 19530325 - CELANESE CORP
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2013079785 A1 20130606; CA 2857558 A1 20130606; CN 104024209 A 20140903; CN 104024209 B 20151125; EP 2785678 A1 20141008; FI 123518 B 20130614; FI 20116209 A 20130602; US 2014330039 A1 20141106; US 9024066 B2 20150505
DOCDB simple family (application)
FI 2012051166 W 20121126; CA 2857558 A 20121126; CN 201280063537 A 20121126; EP 12815718 A 20121126; FI 20116209 A 20111201; US 201214361436 A 20121126